CN2140324Y

CN2140324Y - Cipher-control antitheft device for automobile

Info

Publication number: CN2140324Y
Application number: CN92228689U
Authority: CN
Inventors: 崔贵桐
Original assignee: YUANYANG ELECTRICAL APPLIANCES CO SHENZHEN
Current assignee: YUANYANG ELECTRICAL APPLIANCES CO SHENZHEN
Priority date: 1992-07-30
Filing date: 1992-07-30
Publication date: 1993-08-18
Anticipated expiration: 2002-07-30

Abstract

The utility model provides a cipher-control anti-theft device for automobile. The key of the original vehicle is changed into a key with the cipher which can not be deciphered, a decoder is installed on the lock seat, the decoder receives the signal of the key, and distinguishes whether the signal is correct or wrong, and the starter and the oil line controller are controlled after triggering the signal. The utility model has the advantages of good anti-theft performance, easy use, and simple structure.

Description

Cipher-control antitheft device for automobile

The utility model has related to a kind of car alarm, is specially adapted to the car alarm of cipher control.

Alarms and security systems for automobiles of the prior art usually adopts mechanical system, and the first is installation direction dish latching device on automobile; It two is with firm be hooked together lock bearing circle and a brake pedal or a tire of system.The crucial weakness of this mode is to use traditional mechanical key, and how complicated mechanical key is regardless of making, and all can prepare, and still can allow the car stealer realize joining spoon purpose of robber's car.The someone has invented electronic remote control cipher formula and key passwords formula anti-joyride device at present, but as long as just can make a complete set of anti-covering device malfunctioning certain 2 short circuit in the circuit, the driver misremembers password and just can not start car in addition, if several the shared cars of driver, password does not have great effect yet.

The purpose of this utility model is to provide a kind of and can effectively controls the car stealer and pass through the means of using, not only reliable but also convenient, simple in structure alarms and security systems for automobiles.

The utility model encapsulates the IC integrated package that enrolls 9～11 passwords in automobile key, draw two contacts and connect output signal with the decoder of car direct current power supply and lock respectively, and decoder is by the latching device of controller control starter and master cylinder.When key inserts lock, the energising of the IC integrated package of encapsulation by the decoder output password of another contact to lock, makes decoder for decoding in the key, assert that signal is correct, and the loosen latching device of starter and master cylinder of controller makes the vehicle normal starting.If when desiring launching trolley with other key, decoder gets final product the misjudgment signal, can not open starter and master cylinder, can't start vehicle, simultaneously alarm equipment alarm.

Fig. 1 is the utility model control schematic block diagram.

Fig. 2 is the utility model key built-in circuit schematic diagram.

Fig. 3 is a car starter decoding controller circuit diagram.

Fig. 4 is warning circuit figure.

Scheme shown in Figure 1ly, former automobile key is changed system into the key spoon, judge the correct and mistake of key incoming signal by decoder.When correct signal, decoder starting starter and oil circuit control electromagnetic valve, normal starting vehicle '; When spurious signal, inoperative above-mentioned two controllers of decoder, and the starting annunciator sends acousto-optic and radio alarming.When being robbed, finish two controllers of fail to start and warning function with hiding switch, in driving, can make the driving engine auto shut down and send warning.Fig. 2 is IC in key ₂Enrolled 9～11 passwords in the integrated package, its 2～7 pin holds any end to join in three-state.V _CCIt is the key power input.It is that key insertion lock turns to START position connection 12V power supply, and power supply is through R ₁₀W after the step-down ₁The voltage stabilizing power supply.The DIP2 coding is by IC ₂Parallel input string line output, output signal is through R ₁₂, BG ₄Amplify, through R ₁4 outputs.As shown in Figure 3, signal is input to decoding controller by INT, through R ₁Step-down is at BG ₂Carry out paraphase and amplify, again through R ₄Step-down enters IC ₁Decipher.Work as IC ₁Decoding, if correct, through BG ₁Output makes BG ₂Conducting makes BG again ₃Conducting triggers the controllable silicon SCR conducting, makes relay J ₁Adhesive drives starter.If error code, signal is through R ₆Output low level is opened electronic switch and is driven annunciator.Warning circuit prevents robbing switch connection as shown in Figure 4 to K ₁During the position, be in anti-misfortune state, the signal that at this moment is correct sign indicating number also can be reported to the police.

The utility model compared with prior art has that theftproof performance is good, convenient and reliable, advantages of simple structure and simple.

Claims

1, a kind of cipher control car alarm, form by key, lock, starter and annunciator etc., it is characterized in that encapsulating in the key IC integrated package that enrolls 9～11 passwords, inner end surface has two contacts, when key inserts lock, the IC integrated package is by a contacting direct supply, and another contact is to the decoder input comparison signal of lock.

2,, it is characterized in that lock decoder output is connected respectively to two decoding controllers and the annunciator that is sealed in starter and the electromagnetic valve according to the described car alarm of claim.

3,, it is characterized in that the input end of the decoder of lock is connected with an anti-but switch according to the described car alarm of claim.